simplecpp/main.cpp at master · cppcheck-opensource/simplecpp · GitHub

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* simplecpp - A simple and high-fidelity C/C++ preprocessor library

#define SIMPLECPP_TOKENLIST_ALLOW_PTR 0

#include "simplecpp.h"

#include <cstdint>

#include <cstdlib>

#include <cstring>

#include <fstream>

#include <iostream>

#include <sstream>

#include <string>

#include <sys/stat.h>

#include <utility>

#include <vector>

static bool isDir(const std::string& path)

{

struct stat file_stat;

if (stat(path.c_str(), &file_stat) == -1)

return false;

return (file_stat.st_mode & S_IFMT) == S_IFDIR;

}

int main(int argc, char **argv)

{

bool error = false;

const char *filename = nullptr;

enum : std::uint8_t {

File,

Fstream,

Sstream,

CharBuffer

} toklist_inf = File;

bool fail_on_error = false;

bool linenrs = false;

// Settings..

simplecpp::DUI dui;

dui.removeComments = true;

bool quiet = false;

bool error_only = false;

for (int i = 1; i < argc; i++) {

const char * const arg = argv[i];

if (*arg == '-') {

bool found = false;

const char c = arg[1];

switch (c) {

case 'D': { // define symbol

found = true;

const char * const value = arg[2] ? (argv[i] + 2) : argv[++i];

if (!value) {

std::cout << "error: option -D with no value." << std::endl;

error = true;

break;

}

dui.defines.emplace_back(value);

break;

}

case 'U': { // undefine symbol

found = true;

const char * const value = arg[2] ? (argv[i] + 2) : argv[++i];

if (!value) {

std::cout << "error: option -U with no value." << std::endl;

error = true;

break;

}

dui.undefined.insert(value);

break;

}

case 'I': { // include path

found = true;

const char * const value = arg[2] ? (arg + 2) : argv[++i];

if (!value) {

std::cout << "error: option -I with no value." << std::endl;

error = true;

break;

}

dui.includePaths.emplace_back(value);

break;

}

case 'i':

if (std::strncmp(arg, "-include=",9)==0) {

found = true;

std::string value = arg + 9;

if (value.empty()) {

std::cout << "error: option -include with no value." << std::endl;

error = true;

break;

}

dui.includes.emplace_back(std::move(value));

}

else if (std::strncmp(arg, "-input=",7)==0) {

found = true;

const std::string input = arg + 7;

if (input.empty()) {

std::cout << "error: option -input with no value." << std::endl;

error = true;

break;

}

if (input == "file") {

toklist_inf = File;

} else if (input == "fstream") {

toklist_inf = Fstream;

} else if (input == "sstream") {

toklist_inf = Sstream;

} else if (input == "buffer") {

toklist_inf = CharBuffer;

} else {

std::cout << "error: unknown input type '" << input << "'." << std::endl;

error = true;

break;

}

break;

case 's':

if (std::strncmp(arg, "-std=",5)==0) {

found = true;

std::string value = arg + 5;

if (value.empty()) {

std::cout << "error: option -std with no value." << std::endl;

error = true;

break;

}

dui.std = std::move(value);

}

break;

case 'q':

if (std::strcmp(arg, "-q")==0) {

found = true;

quiet = true;

}

break;

case 'e':

if (std::strcmp(arg, "-e")==0) {

found = true;

error_only = true;

}

break;

case 'f':

if (std::strcmp(arg, "-f")==0) {

fail_on_error = true;

found = true;

}

break;

case 'l':

if (std::strcmp(arg, "-l")==0) {

linenrs = true;

found = true;

}

break;

}

if (!found) {

std::cout << "error: option '" << arg << "' is unknown." << std::endl;

error = true;

}

} else if (filename) {

std::cout << "error: multiple filenames specified" << std::endl;

return 1;

} else {

filename = arg;

}

if (error)

return 1;

if (quiet && error_only) {

std::cout << "error: -e cannot be used in conjunction with -q" << std::endl;

return 1;

}

if (!filename) {

std::cout << "Syntax:" << std::endl;

std::cout << "simplecpp [options] filename" << std::endl;

std::cout << " -DNAME Define NAME." << std::endl;

std::cout << " -IPATH Include path." << std::endl;

std::cout << " -include=FILE Include FILE." << std::endl;

std::cout << " -UNAME Undefine NAME." << std::endl;

std::cout << " -std=STD Specify standard." << std::endl;

std::cout << " -q Quiet mode (no output)." << std::endl;

std::cout << " -input=INPUT Specify input type - file (default), fstream, sstream, buffer." << std::endl;

std::cout << " -e Output errors only." << std::endl;

std::cout << " -f Fail when errors were encountered (exitcode 1)." << std::endl;

std::cout << " -l Print lines numbers." << std::endl;

return 0;

}

// TODO: move this logic into simplecpp

bool inp_missing = false;

for (const std::string& inc : dui.includes) {

std::ifstream f(inc);

if (!f.is_open() || isDir(inc)) {

inp_missing = true;

std::cout << "error: could not open include '" << inc << "'" << std::endl;

}

for (const std::string& inc : dui.includePaths) {

if (!isDir(inc)) {

inp_missing = true;

std::cout << "error: could not find include path '" << inc << "'" << std::endl;

}

std::ifstream f(filename);

if (!f.is_open() || isDir(filename)) {

inp_missing = true;

std::cout << "error: could not open file '" << filename << "'" << std::endl;

}

if (inp_missing)

return 1;

// Perform preprocessing

simplecpp::OutputList outputList;

std::vector<std::string> files;

simplecpp::TokenList outputTokens(files);

{

simplecpp::TokenList *rawtokens;

if (toklist_inf == Fstream) {

rawtokens = new simplecpp::TokenList(f,files,filename,dui,&outputList);

}

else if (toklist_inf == Sstream || toklist_inf == CharBuffer) {

std::ostringstream oss;

oss << f.rdbuf();

f.close();

const std::string s = oss.str();

if (toklist_inf == Sstream) {

std::istringstream iss(s);

rawtokens = new simplecpp::TokenList(iss,files,filename,dui,&outputList);

}

else {

rawtokens = new simplecpp::TokenList({s.data(),s.size()},files,filename,dui,&outputList);

}

} else {

f.close();

rawtokens = new simplecpp::TokenList(filename,files,dui,&outputList);

}

if (dui.removeComments)

rawtokens->removeComments();

simplecpp::FileDataCache filedata;

simplecpp::preprocess(outputTokens, *rawtokens, files, filedata, dui, &outputList);

simplecpp::cleanup(filedata);

delete rawtokens;

}

// Output

if (!quiet) {

if (!error_only)

std::cout << outputTokens.stringify(linenrs) << std::endl;

for (const simplecpp::Output &output : outputList) {

std::cerr << outputTokens.file(output.location) << ':' << output.location.line << ": ";

switch (output.type) {

case simplecpp::Output::ERROR:

std::cerr << "#error: ";

break;

case simplecpp::Output::WARNING:

std::cerr << "#warning: ";

break;

case simplecpp::Output::MISSING_HEADER:

std::cerr << "missing header: ";

break;

case simplecpp::Output::INCLUDE_NESTED_TOO_DEEPLY:

std::cerr << "include nested too deeply: ";

break;

case simplecpp::Output::SYNTAX_ERROR:

std::cerr << "syntax error: ";

break;

case simplecpp::Output::DIRECTIVE_AS_MACRO_PARAMETER:

std::cerr << "directive as macro parameter: ";

break;

case simplecpp::Output::PORTABILITY_BACKSLASH:

case simplecpp::Output::PORTABILITY_LINE_DIRECTIVE:

case simplecpp::Output::PORTABILITY_NO_EOF_NEWLINE:

std::cerr << "portability: ";

break;

case simplecpp::Output::UNHANDLED_CHAR_ERROR:

std::cerr << "unhandled char error: ";

break;

case simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND:

std::cerr << "explicit include not found: ";

break;

case simplecpp::Output::FILE_NOT_FOUND:

std::cerr << "file not found: ";

break;

case simplecpp::Output::DUI_ERROR:

std::cerr << "dui error: ";

break;

}

std::cerr << output.msg << std::endl;

}

if (fail_on_error && !outputList.empty())

return 1;

return 0;

}

simplecpp/main.cpp at master · cppcheck-opensource/simplecpp · GitHub

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